Recent Achievements at J-PARC and Future Prospects of Hypernuclear Studies H. Tamura Tohoku University 1. Present status of hypernuclear physics at J-PARC 2. LN-SN interaction and L in neutron matter 2.1 hypernuclear g -ray data for p-shell 2.2 Charge Symmetry Breaking in L N -- New A=4 data -- 2.3 Neutron-rich hypernuclei 3. Toward double strangeness systems 4. Hadron Hall Extension Plan 5. Summary 2016. 3. 15 JLab WS
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Recent Achievements at J-PARC and
Future Prospects of Hypernuclear Studies
H. Tamura
Tohoku University
1. Present status of hypernuclear physics at J-PARC
2. LN-SN interaction and L in neutron matter
2.1 hypernuclear g-ray data for p-shell
2.2 Charge Symmetry Breaking in LN -- New A=4 data --
2.3 Neutron-rich hypernuclei
3. Toward double strangeness systems
4. Hadron Hall Extension Plan
5. Summary
2016. 3. 15
JLab WS
1. Present status of
Hypernuclear physics
at J-PARC
Present status of J-PARC Hadron Hall
and nuclear/hadron physics
Handron Hall
Beam
Dump
K1.8
K1.8BR
K1.1BR 30~50 GeV
primary beam
Production target (T1)
Approved experiments ( stage2 / stage1)
KL
E15: K-pp bound states
E31: L(1405) structure
E62: K-He atomic X-rays
E57: K-d atomic X rays
E29: f nucleus
E63: g spectroscopy of L hyp.
High Mom.
Line
E19: Q+ search
E10: n-rich L hypernuclei
E27: K-pp bound states
E13: g spectroscopy of L hyp.
E07: LL hypernuclei
E05: X Hypernuclei
E16: Hadron mass in nuclei
E50: Charmed baryons
Finished / running, data partly taken /
waiting, under preparation
E03: X-atomic X rays
E18: Weak decays of L hyp.
E40: Sp scattering
E08: Pion double charge exch.
E22: Weak decays of A=4 L hyp.
E26: w nucleus
E42: H dibaryon search
E45: 3-body hadronic reactions
K1.1
Present status of J-PARC Hadron Hall
and nuclear/hadron physics
Handron Hall
Beam
Dump
K1.8
K1.8BR
K1.1BR 30~50 GeV
primary beam
Production target (T1)
Approved experiments ( stage2 / stage1)
KL
E15: K-pp bound states
E31: L(1405) structure
E62: K-He atomic X-rays
E57: K-d atomic X rays
E29: f nucleus
E63: g spectroscopy of L hyp.
High Mom.
Line
E19: Q+ search
E10: n-rich L hypernuclei
E27: K-pp bound states
E13: g spectroscopy of L hyp.
E07: LL hypernuclei
E05: X Hypernuclei
E16: Hadron mass in nuclei
E50: Charmed baryons
Finished / running, data partly taken /
waiting, under preparation
E03: X-atomic X rays
E18: Weak decays of L hyp.
E40: Sp scattering
E08: Pion double charge exch.
E22: Weak decays of A=4 L hyp.
E26: w nucleus
E42: H dibaryon search
E45: 3-body hadronic reactions
K1.1
Experiments for neutron stars
L has no isospin, but LN int. in symmetric matter and in neutron matter are different!
L-S mixing
~a few %
L
S D
N
1. LN interaction in neutron matter (1) LNN 3-body force = r and T dep. of LN int. Precise BL for various (asymmetric) L hypernuclei
12LB, 16
LN, 28LAl, 52
LV 40LK, 48
LK, …., 208LTl
LN scattering exp. to determine 2-body force and to extract 3-body force effects from hypernuclear data
(2) LN-SN coupling/ Ln force Light neutron-rich hypernuclei 6LH 9LHe,…
Charge Symmetry Breaking 4LH, 4LHe, 7LHe, 10LBe
2. S=-2 interactions LL hypernuclei, X hypernuclei, X-atomic X-rays
3. SN interaction (in particular, S-n = S+p ) S±p scattering experiment
4. Kbar interaction in nuclear matter K-pp search
J-PARC E03/E07
J-PARC E07 J-PARC E05
J-PARC E40
J-PARC E15
J-PARC E10
J-PARC E13
J-PARC E63
J-PARC E10/ HIHR
J-PARC K1.1
JLab 15-008
JLab E01-011/ E05-115 Mainz A1
DAFNE FINUDA
JLab E01-011/ E05-115
J-PARC HIHR
Recent data
Under preparation/Planned
J-PARC E27 DAFNE FINUDA
JLab E94-107
2. LN-SN interaction and
L in neutron matter
2.1 p-shell hypernuclear data
2.2 Charge Symmetry Breaking in LN
-- New A=4 data –
2.3 Neutron-rich hypernuclei
LN Interaction in neutron(-rich) matter
L has no isospin, but LN int. in neutron matter is different due to strong LN-SN int.
Hypernuclear data: UL = - 30 MeV
= L in symmetric matter, at r0
-> Large L-S mixing in hypernuclei
L-S mixing
~a few %
L
S D
N
Akaishi et al. PRL 84 (2000) 3539
I=1
L I=0 I > 0
n n n
n
I > 0
n n n
n
S
L S
I=0 I=1
p I=0
p n n p
I=0
p n n
Coherent effect in n-rich matter -> Attractive LNN force Explains A=3,4,5 hypernuclei
At short range (large r), Lnn strongly repulsive?
Precise BL and level energy data for asymmetric (neutron-rich) L hypernuclei BL for s- and p-shell hypernuclei: 4LH, 6LH; 7LHe, 9
LHe;
g-rays for s- and p-shell:
Charge Symmetry Breaking: 4LH / 4LHe, 7LHe / 7
LLi*,
-> SN-LN interaction BL for medium/heavy asymmetric L hypernuclei:
40LK / 48
LK, …208LTl; (40
LCa 48LCa, …208
LPb) -> T, r dependence of LN int. (LNN force)
SN->LN scattering experiments
How to experimentally study?
9LLi, 10
LLi; …
10LBe / 10
LB, 12LB / 12
LC
(e,e’K+)@JLab (p-, K+)@J-PARC
(e,e’K+)@JLab (p+, K+)@J-PARC ?
(K-, p-) @J-PARC
(e,e’K+)@JLab (K-, p-) @J-PARC ?
@J-PARC
2. LN-SN interaction and
L in neutron matter
2.1 p-shell hypernuclear data
2.2 Charge Symmetry Breaking in LN
-- New A=4 data –
2.3 Neutron-rich hypernuclei
Hypernuclear g-ray data before 1998 Hypernuclear g-ray data (2014) Hyperball 1998~
6.041 1-
2- 3/2-
M1
PTEP 2015 (2015) 8, 081D01
Hypernuclear g-ray data before 1998 Hypernuclear g-ray data (2014)
Quark Pauli effect in S+p (S=1) channel -> one of the origins of BB repulsive core Precise 2-body data essential to extract many-body effects in hypernuclei
Establish B-B interactions S
p
High statistical data of ds/dW and spin observables with wide p
Effect of partial restoration of chiral symmetry?
LQCD
p
K+
S
p
p
p/n
LH2 target
Fiber tracker
Calorimeter
PiID counter
Forward calorimeter
50 cm
CATCH SKS
SKS
K1.1
5. Summary
Beam came back to Hadron Hall in April, 2015.
LN-SN interaction and L in neutron-rich matter
Observation of 4LHe(1+->0+) g-ray and confirmed existence of a large
CSB effect in LN interaction, giving good constraints to LN-SN force.
Both of the p-shell g-ray data and the A=4 CSB data suggest a central-
dominated LN-SN force.
More 6LH data as well as other n-rich hypernuclear data are needed.
Stronger beam power. S=-2 program has just started.
The emulsion exp. (E07) for LL hypernuclei and X-atomic X-rays are
will start production run soon.
X-hypernuclear spectroscopy (E05) carried out a pilot run.
Hadron Hall Extension is planned.
HIHR line for precise BL for various L hypernuclei incl. n-rich ones.